Sorry if I have been confusing! In your original post I misunderstood and thought you were asking about Meta Keywords- which are useless. You definitely should be utilizing the Title, Description, H1, H2, and alt Tags for your images.

Meta tags is an overall term for tags in the header meant to help search engines or search engine rankings (among other things) Title tag is one type of meta tag. Meta tags include Title, Description, Keywords, and other things the web designer may want to include such as Alt, robots, H1, H2 etc.